Burndown Chart: Multiple parsing errors

Issue Summary

The "Burndown Chart" page has encountered few errors and warnings.

Steps to Reproduce

1. Navigate to the "Projects" dropdown and activate it.
2. Select the "Scrum" project and activate it.
3. Navigate to the "Side navigation".
4. Navigate to the "Reports" link and activate it.
5. Navigate to the "Switch Report" dropdown.
6. Select the report "Burndown Chart".
7. Observe that "Burndown Chart" page has been appeared on the screen.

Screenshot

Actual Results

The HTML code of the website does not validate against the HTML 5 specification. For instance, the source code presents BBBBB errors and BBBBB warnings when checked with the NU HTML checker.
 
The following errors were generated by HTML validator: * Element missing stray end tag.

• Element not nested correctly according to HTML specification

 
This may result in user agents, including assistive technologies, to not accurately interpret and parse content.

Expected Results

To meet accessibility conformance, it is necessary that the following requirements are met: * All elements are nested properly according to their HTML specifications.

• All elements have complete start `<>` and end `</>` tags.
• Within each page, the elements use unique `id` attribute values.
• Elements do not have duplicate attributes.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available

Environment

acBook Pro (16-inch, 2019)
macOS Ventura Version 13.3.1
Chrome - Version 112.0.5615.49 (Official Build) (x86_64)
Firefox- Version 112.0.1 (64-bit)
Safari- Version 16.4 (18615.1.26.11.23)
JAWS- Version 2022
NVDA- Version 2020.3
Voiceover - Version Latest